Mechanical sounder for telegraph systems.



P. P. BM!HOLZERA MECHANICAL SOUNDER FOR TELEGRAPH SYSTEMS.

APPucATmN mED APR 3l 19m.

tellin fi MECHANICAL SOUNDER FOR, TELEGRAPH SYSTEMS.

Specification ofLetters Patent.

Taten te d Application filed April 8, 1912. Serial No. 658.228.

to provide. el'ieient means 'tor tra nsmittinnmechanical sounds to telephone transmitters; third, to provide means tor obtaining maximum amplitude ot' transmifion ot' mechanical sounds on operation ot' the soumler; fourth, to eliminate damping elfcets in thel transmission ot mechanical sounds to the telephone transmitter.

ll'ith these objects in view, mv invention consists o t certain novel features ot' coni struction and arrangement ot parts as will hereinafter he. more fully described and pointed out in the claims. reference heine; had to the accompanying drawing toi-mingr part ot' this specification and in whichli`i, ;nre l is a longitudinal section on A--l' Fig. 2 and showingmore particularly the arrangement of the sounding mechanism and the. method employed tor the mechanical transmission ot the sound vihrations to the ordinari-Y telephone. transmitter, Fig'. .2 a plan of the sounder and showing' the removable attached mechanism to the transmitter support.

Referring to the figures in which Similar numerals of reference refer to similar parts throughout the several views.y the numeral l designates the support and numeral 2 designates the transmitter ol" the ordinarv 'teleplione; 3 designates the sounder hast. on whieh the lever arm lfor the nieehaniral operation of sounder is mounted; the hase I3 has an extended portion ,17, more partien-u la rly shown in Fie'. 2 and which is rounded out to fit one half otl periplieijv ot' the transmitter support l; il) designates a part similar to the, extended portion 'lT and which is also rounded out to I'it the remaining` periphery ot the. transmitter support l l designates screws which are. in threaded engagement with partll); the part l? provided with holes J0 slightl.,y larger thanlthe diameter ot the serews l. it will he evident that upon the insertion olf the srrewai l through the holes 20, that upon the threaded engagement ot the .screws l and the part. la that the sounder hase can he riggifllv elamlnd to the `transmitter support. l. l hase is also provided with a sulisi'iantiallv U-shaped bracket T and in wl `oli sounder lever 5 pivotallv Sugi'iorted tav means olE a pin G. i

H designates an operating knob in fixed relation with sounder lev Y 5. linee 3 is provided with a raised portion .fl and an efr'- tcnded portion or arm 10 limiting' the annular travel ot sounder lever-.5 about .its pivotal support pin t3.

ll designates a set screw provided with a loi-linut l2 and is in threaded engagement withtlie extended portion l0. it will lic evident that an adjustment of the angular travel ot" the sounder lover 5 about its pit otal support pin t3 can he el'lfeeted by an adjustment of the set screw il. l v

1G designates a .lng rottend/eti from the hase and provided with a hollow chamY her 1S. in which is inserttal a ronnneesion sprint: 15.

13 designates a set Screw provided with a lock nut ll and whieh'is in threaded en.s gagement with 'the sounder lever 3. .he end ot the set screw 13 is rigidly connected. to one end ot the con'nnression spring lt will he evident that spring .l5 when under compression will tend to angular-lv revolve sounder lever 5 about its pivotal supi'iort pin l5 until it engages the end ot' the set screw 1l. It will he further evident that the adiustment ot' the compression Spring l5 can he el'lected h v an adjustment of the Set screw 13.

Having' thus descrihed the vai-irais: parte throughout the Several views all oli which will lio readili7 nuclei-storni hv those .skilled in the art to which, this invention relates` lits operation will he. euhstantiail)Y as follows: rThe. sounder hasey i through extended portion li" and part lil heiinf ited relation to the. transmitter supper ih it will he evident that upon the striking' of' the linoh S the sounder lever 5 will al 53st the raised. portion il and set up vihration i will he transmitted mechanicallv to the trai'ismittei.' 0. On release oi the lmet 8 it will he 'line ther evident that the sounder lever 5`v`7ill rotate about its pivotal support pin 6 and engage the set screw l1, due to the spring l5 being previously placed under compression.

. It will be further evident that upon the 'engagement of the sounder lever 5 and Set screw 1l that mechanical vibrations will be set up in sounder base Band transmitted to transmitter 2 as previously explained. The signals mechanically' transmitted to the transmitter 2 can be distinctly heard in a telephone receiver when using the line for telephone purposes. lt'will be further evi- A dent that Morse or other similar telegraph l5.

signals may be transmitted to the telephone transmitter upon the operation of the knob S and the engagement of the sounder lever 5 and the raised portion 9 and' the set screw 11.

By arranging the depth of the extended portion 17 and li) so that the peripheral clamping area. is considerable it has been found in practice that the mechanical transmission of sound to the telephone transmitter is greatly increased over what can be effected by mounting the sounder direct on the telephone support base; and thereby accomplishing the heretofore mentioned iirst iobject of my said invention. .lt will be further evident that by pivoting the sounder lever at the extremity otl base 3 that a maximum amplitude of sound vibrations is reffected than could otherwise be obtained by pivoting the sounder lever intermediate ofthe striking knob and the back stroke striking member' such as is found in the ordinary telegraph key; and thereby accom plishing the heretofore mentioned second object of my said invention. It will be further evident that by arranging the sounder base 3 integral with the extended clamping portion 17 without any intervening secured lixed members that the damping effect ot the transmission of mechanical sounds to the telephone support is limited to a minmum; and thereby accomplishing the heretofore n'lentioned`tlii1'd object of my said invention. lt will also be further eyideilt that'by the arrangement of the extended portion 17 and part 19 and the threaded engagement of member 4 and part 19 that a simple and effective device has been devised and which can be adjustably removably attached to a telephone instrument; and thereby accon'iphshing the heretofore ment inedtfourth object of my said invention. l' f I do notwish'to limit myself rto the exact construction ot the apparatus as shown as it is evident that departures can be made therefrom widient-departing from the spirit and intent oi my said invention. butvWhat I claim as new and desire to .secure by Letters Patent is:

t 1. mechanical signaling device comprising in combination with a telephone transmitter having a rigid metallic support,.` a mechanical sounder including a base rigidly and detachably clamped to the said support' and. having' an vabutment and a bracket formed at opposite ends thcrco'l, an arm` integral` with said base and karranged to project over and above the abutment thereon, and a spriiig-retracted sounding lever pivotally mounted inthe bracket on the base and adapted to engagf tbc said abutment to set up vibrations for transmission to the said trallsmitter.

A mechanical signalingr device compris'- ing in combination with a telephone transmitter having a rigid nrtallic support, a base having a separable clamp for attaching the same to ysaid telephone transmitter support; a substantially U-shapedr bracket termed at one end ot said base,l an abutment on the base opposite the bracket, an arm integral with said bass and arranged to procarried by said base for limiting the play of said sounding lever.

ln testimonywhereof I have hereunto signed my name to this specification inthe presence of two subscribing Witnesses. 1`

, 'PAUL P. BANHOLZER. lVi tnesses J. F. SMYTH, Tnoiaas B. SMITH. 

